with vanes reciprocating with respect to the outer member

Rotary-piston machines or pumps > having the characteristics covered by two or more of groups , , , or having the characteristics covered by one of these groups together with some other type of movement between co-operating members > having the movement defined in group or and relative reciprocation between the co-operating members > with vanes reciprocating with respect to the outer member

Rotary-piston machines or pumps (with non-parallel axes of co-operating members F04C3/00; with the working-chamber walls at least partly resiliently deformable F04C5/00; with fluid ring or the like F04C7/00; rotary-piston pumps specially adapted for elastic fluids F04C18/00; rotary-piston machines or pumps in which the working-fluid is exclusively displaced by, or exclusively displaces, one or more reciprocating pistons F04B) > having the characteristics covered by two or more groups F04C2/02, F04C2/08, F04C2/22, F04C2/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members > having the movement defined in groups F04C2/08 or F04C2/22 and relative reciprocation between the co-operating members > with vanes reciprocating with respect to the outer member